Printing machine



FIG. 1 is a front, and right side perspective view of a printing machine showing our new design;

FIG. 2 is a right side perspective view thereof;

FIG. 3 is a front, perspective view thereof;

FIG. 4 is a rear perspective view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a left side perspective view thereof.

The bottom is plain and unadorned. 

The ornamental design for a printing machine, as shown and described. 